An affection of 2 homosexuals touching each others balls. Bromance explosion is just the climax. (Also can be 2 guys to afraid to admit they are gay and too scared to come out of the closet and lose their heterosexual friends.)

2 gay males in love with each other and bum poking. Bromance explosion is the act of ejaculating on each other. (Obviosly gay.) Using the word bromance leads to becoming gay. (Bromancing the stone, loving each others testicales)